02-22-2019 02:23 PM
Upgrading your ONT doesn't necessarily have any effect on your wireless performance, unfortunately. The 802.11ac standard used on the 5GHz band has a theoretical maximum of around 1.3 Gbps, but the reality is it's much less.
Unfortunately, from the comments I've seen on here, the wireless portion of the G1100 seems weak. (That's the router I assume you have. It's the most common one.) I am using an Asus WRT1900ACS in bridge mode for my wireless access. The goes for about $160 on Amazon. It's overkill to use just as a wireless access point (WAP), but it works very well. Another plus is since the router isn't also serving as the WAP, I can place the WRT1900ACS anywhere to which I can run an Ethernet cable. Mine's in the basement, but in the middle of the house and as close to the ceiling as I could get it.
My setup: 75/75 Mbps; Linux router (2x 1Gbps ports) + iptables; Linksys WRT1900ACS in Bridge Mode]